un·​treat·​ed | \ ˌən-ˈtrē-təd How to pronounce untreated (audio) \

Definition of untreated

: not treated untreated wastewater especially : not improved or controlled medically an untreated case of pneumonia untreated diabetic patients

Synonyms & Antonyms for untreated



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Examples of untreated in a Sentence

Recent Examples on the Web After some tests in AHS’ animal trauma hospital, it was found that his injuries were due to severe allergies that were left untreated. The Arizona Republic, 27 Nov. 2021 Northern Ireland today is a rot in the heart of the Western alliance that is being left untreated. Tom Mctague, The Atlantic, 17 Nov. 2021 The diagnosis of a rare congenital heart defect that could have killed him if left untreated. Connor Letourneau, San Francisco Chronicle, 10 Nov. 2021 But if left untreated, after a decade or more, syphilis will reemerge in up to 30% of patients, capable of wreaking horror on a wide range of organ systems. Talia Herman, ProPublica, 1 Nov. 2021 That group includes people who are taking medications that can suppress their immune systems for organ transplants or cancer, the CDC says, as well as people facing significant immunodeficiency from diseases like advanced or untreated HIV. Alexander Tin, CBS News, 28 Oct. 2021 Cancer patients undergoing active treatment, some organ and stem cell transplant recipients, people with moderate or severe immunodeficiencies, people with advanced or untreated HIV, and those taking high-dose corticosteroids are in this group. Washington Post, 17 Aug. 2021 Also on the list are people with advanced or untreated HIV infection, those taking high-dose steroids, and those who have chronic medical conditions that can weaken immune response, such as chronic kidney disease. Compiled Democrat-gazette Staff From Wire Reports, Arkansas Online, 14 Aug. 2021 Also included are recipients of CAR-T-cell therapies or bone marrow transplants, those with moderate or severe primary immunodeficiency, as well as persons with advanced or untreated HIV infection. Johnny Edwards, ajc, 13 Aug. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'untreated.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of untreated

15th century, in the meaning defined above

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The first known use of untreated was in the 15th century

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Last Updated

30 Nov 2021

Cite this Entry

“Untreated.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/untreated. Accessed 4 Dec. 2021.

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More Definitions for untreated



English Language Learners Definition of untreated

: not getting medical care : without medical treatment
: not made better or safer by being treated with a chemical or other substance


un·​treat·​ed | \ -ˈtrēt-əd How to pronounce untreated (audio) \

Medical Definition of untreated

: not subjected to treatment an untreated disease

More from Merriam-Webster on untreated

Nglish: Translation of untreated for Spanish Speakers


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